Which of the following is an example of artificial selection?
a. scientists have bred strains of the house mouse that are missing certain alleles. These strains were produced in the laboratory to allow scientists to study diseases that occur in humans.
b. The ancestor of broccoli was weedy looking plant that looks very different than broccoli. Farmers selected plants with large stems and flowers and used their seeds to produce the next generation. Over time this became what we now call broccoli.
c. Long ago people started to keep wild cats and bred the most docile ones. After many generations of doing this and selecting for traits that people liked, we now have domestic house cats.
d. all of these
Ans: d. all of these
You might also like to view...
Increases output of pancreatic juice and bile
What will be an ideal response?
How does crossing-over during meiosis contribute to genetic variation?
A. Each cell created has chromosomes only from a single parent. B. Crossing-over always causes loss of some genetic information. C. Because genes will be in a new order on some chromosomes,additional DNA will need to be made. D. The exchange of genetic material between homologous chromosomes means that a single chromosome now combines genetic information from both parents.
Acidic foods generally need a higher canning temperature than do nonacidic foods
Indicate whether the statement is true or false.
In a Drosophila oocyte, bicoid mRNA produced by the mother is localized at one end of the egg rather than evenly distributed throughout the egg. This is an example of:
A. translational control of gene expression during development. B. translational control of development. C. hierarchical control of gene regulation during development. D. maternal developmental effect. E. oocyte polarization.